Make this back in 2022 I believe and since it's spooky month/season here a bit of inform about this dude
CW/TW: Death by Drowning, Mention of death, and corpse wearing(?)
The story conpect of this Sonic exe form was that an player find/fish an airtight container with an copy of Sonic CD from an lake. When plug in to an gaming system it still work and everything is normal until reaching Tidal Tempest Zone. Is when everything started to get omnious/creepy. The levels/acts gets more underwater and difficult with less air bubbles, glitches make appearance, Sonic color pallette gets paler/dark (when fur/clothes get wet and leave out of in the sun dor too long). Until the last act where the player seem pile of dead Sonic died from drowning by previous players and more keeps getting added in it.
The form concept is that an water demon enter and use one of the drowned Sonic corpses that was still in perfect condition to be used as an skin suit/jacket slowly and carefully stitch/sewed the opened wounds (explain the pale cold wet appearance) since the body used cause of death was stab by spikes while drowning. And the tentacles are used as weapon, offenses in combat and to drag victims to the depth of deep dark ocean/lake.